Bipolar electroluminescent device
CA 2215400 C · Owner: Epstein, Arthur J. · Inventors: Gebler, Darren Douglas; Epstein, Arthur J.; Wang, Yunzhang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Light-emitting bipolar devices (10) consist of a light emitter (15) formed from an electroluminescent organic light-emitting material in contact with an insulating material. The light emitter (15) is in contact with two electrodes (12, 18) that are maintained in spaced-apart relation with each other. The light emitter (15) can be formed as an integral mixture of light-emitting materials and insulating materials or as separate layers of light-emitting and insulating materials. The devices operate with AC voltage (24) of less than twenty-four volts and in some instances at less than five volts. Under AC driving, the devices produce modulated light output that can be frequency or …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 12, 1996 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.